Naya's voice is stubborn, bright with desperation, and it anchors every room she enters. Her chemistry with night nurse Mina Kade provides a humane countercurrent to the clinic's chill, an exchange of quick trust and tentative humor that makes the tunnels and blackout scenes bearable.
Dr. Harrow's cultivated calm hides a collector's instinct, and even the nameless tapper with the silver metronome reads as a person making their own cage. Dialogue is taut without being quippy, and small choices, like how Naya pockets a brass key and how Mina folds a blanket like a message, speak louder than speeches.